@-moz-document url(chrome://browser/content/browser.xul), url(chrome://browser/content/browser.xhtml) {
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

/* TABS: on bottom - Firefox 65 and later */

#navigator-toolbox toolbar:not(#nav-bar):not(#toolbar-menubar) {-moz-box-ordinal-group: 10 !important;}
#TabsToolbar {-moz-box-ordinal-group: 1000 !important;display: block !important;position: absolute !important;
bottom: 0 !important;/* width: 100vw !important; */}
:root[tabsintitlebar]:not([inFullscreen="true"]):not([sizemode="maximized"])
#toolbar-menubar[autohide="true"] ~ #TabsToolbar{bottom: var(--tab-min-height) !important;
padding-top: calc(var(--tab-min-height) - 20px) !important; /* may need adjustment */}
#tabbrowser-tabs {width: 100vw !important;}
:root:not([chromehidden*="toolbar"]) #navigator-toolbox {padding-bottom: calc(var(--tab-min-height) + 1px); /* may need adjustment */}

/* TABS: height */
:root {--tab-toolbar-navbar-overlap: 0px !important;--tab-min-height: 25px !important; /* adjust */}
:root #tabbrowser-tabs {--tab-min-width: 80px !important; /* adjust */}
#tabbrowser-tabs,
#tabbrowser-tabs > .tabbrowser-arrowscrollbox,
.tabbrowser-tabs[positionpinnedtabs] > .tabbrowser-tab[pinned] {
min-height: var(--tab-min-height) !important;max-height: var(--tab-min-height) !important;}

#TabsToolbar {height: var(--tab-min-height) !important;margin-bottom: 1px !important;
box-shadow: ThreeDShadow 0 -1px inset, -moz-dialog 0 1px !important; /* omit */
background-color: var(--toolbar-bgcolor) !important;color: var(--toolbar-color) !important;}

/* indicators */
.private-browsing-indicator {display: none !important;}
.accessibility-indicator {display: none !important;}

/* drag space */
.titlebar-spacer[type="pre-tabs"],
.titlebar-spacer[type="post-tabs"] {width: 20px !important;}

/* Override vertical shifts when moving a tab */
#navigator-toolbox[movingtab] > #titlebar > #TabsToolbar {padding-bottom: unset !important;}

#navigator-toolbox[movingtab] #tabbrowser-tabs {padding-bottom: unset !important;margin-bottom: unset !important;}
#navigator-toolbox[movingtab] > #nav-bar {margin-top: unset !important;}

/* windows controls - hide */
#TabsToolbar #window-controls {display: none !important;}

/* caption box - hide */
:root[tabsintitlebar]:not([inFullscreen="true"])
#toolbar-menubar[autohide="true"] ~
#TabsToolbar .titlebar-buttonbox-container {display: none !important;}
}
/* ========= Compléments ========= */
/* Coins arrondi des onglets */

#TabsToolbar .tabs-newtab-button,
#TabsToolbar .tabbrowser-tab,
#TabsToolbar .tabbrowser-tab .tab-stack,
#TabsToolbar .tabbrowser-tab .tab-

background,
#TabsToolbar .tabbrowser-tab .tab-content {
border-top-left-radius: 8px !important;
border-top-right-radius: 8px !important; }

/*Permet d'arrondir les onglets actifs*/
.tab-background {border-radius: 16px 16px 0px 0px !important;border-image: none !important;}
.tab-line {display: none;}

/* ========= FIN Complément ========= */

=========================================